Matt Robinson & Tom Wrigglesworth have created a visualization about the ink usage of different typecases. The brilliancy here lies in the method on how the data is representated: the ink itself!

A selection of the most commonly used typefaces were compared for how economical they are with the amount of ink which they use at the same point size. Large scale renditions of the typefaces were drawn out with ballpoint pens, allowing the remaining ink levels to display the ink efficiency of each typeface.